MAX5477 - Maxim

MAX5477 Digital Potentiometers

The MAX5477/MAX5478/MAX5479 nonvolatile, dual, linear-taper, digital potentiometers perform the function of a mechanical potentiometer, but replace the mechanics with a simple 2-wire digital interface. Each device performs the same function as a discrete potentiometer or variable resistor and has 256 tap points. The devices feature an internal, nonvolatile E.

Features

♦ Power-On Recall of Wiper Position from Nonvolatile Memory ♦ EEPROM Write Protection ♦ Tiny 3mm x 3mm x 0.8mm Thin QFN Package ♦ 35ppm/°C End-to-End Resistance Temperature Coefficient ♦ ♦ ♦ ♦ 5ppm/°C Ratiometric Temperature Coefficient Fast 400kbps I2C†-Compatible Serial Interface 1µA (max) Static Supply Current Single-Supply Operation: +2.7V to +5.25V MAX5477/MAX5478/MAX5479 ♦ 256 Tap Positions per Potentiometer ♦ ±0.5 LSB DNL in Voltage-Divider Mode ♦ ±1 LSB INL in Voltage-Divider Mode Functional Diagram VDD GND HA 8-BIT SHIFT REGISTER 8 16-BIT LATCH 8 256 POSITION DECODER 256 WA POR SD.